2171392 has 20 divisors (see below), whose sum is σ = 4339566. Its totient is φ = 1085440.

The previous prime is 2171387. The next prime is 2171431. The reversal of 2171392 is 2931712.

2171392 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1218816 + 952576 = 1104^2 + 976^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609 + ... + 2632.

2^2171392 is an apocalyptic number.

It is an amenable number.

2171392 is a deficient number, since it is larger than the sum of its proper divisors (2168174).

2171392 is an frugal number, since it uses more digits than its factorization.

2171392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259 (or 4243 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 2171392 is about 1473.5643861060. The cubic root of 2171392 is about 129.4929360150.

The spelling of 2171392 in words is "two million, one hundred seventy-one thousand, three hundred ninety-two".